Merge pull request #2866 from ControlSystemStudio/Bugfix-FilepathsOnWindows

CSSTUDIO-2076 Bugfix: add a leading forward slash and replace backslashes in file-paths with forward slashes in `DisplayInfo.forModel()`

Author: abrahamwolk

app/display/runtime/src/main/java/org/csstudio/display/builder/runtime/app/DisplayInfo.java

@@ -13,6 +13,7 @@
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.net.URLEncoder;
+import java.util.Locale;
 import java.util.logging.Level;
 
 import org.csstudio.display.builder.model.DisplayModel;
@@ -112,7 +113,26 @@ private static String basename(final String path)
      */
     public static DisplayInfo forModel(final DisplayModel model)
     {
-        return new DisplayInfo(model.getUserData(DisplayModel.USER_DATA_INPUT_FILE),
+        String path;
+        {
+            String userDataInputFile = model.getUserData(DisplayModel.USER_DATA_INPUT_FILE);
+            String userDataInputFile_lowerCase = userDataInputFile.toLowerCase(Locale.ROOT);
+            if (   !userDataInputFile_lowerCase.startsWith("/")
+                && !userDataInputFile_lowerCase.startsWith("examples:")
+                && !userDataInputFile_lowerCase.startsWith("file:")
+                && !userDataInputFile_lowerCase.startsWith("http:")
+                && !userDataInputFile_lowerCase.startsWith("https:")
+                && !userDataInputFile_lowerCase.startsWith("ftp:")
+                && !userDataInputFile_lowerCase.startsWith("jar:")) {
+                // Add leading '/' and replace occurrences of '\' by '/' in the file path on Windows:
+                path = "/" + userDataInputFile.replace('\\', '/');
+            }
+            else {
+                path = userDataInputFile;
+            }
+        }
+
+        return new DisplayInfo(path,
                 model.getDisplayName(),
                 model.propMacros().getValue(),
                 false);